CD274 and neoplasm: Most of the cases evaluated with the two PD-L1 clones showed a low tumor proportion score or tumor cell score (low TPS/low TC), with higher expression (high TPS/high TC) observed in 9.5% of cases (n = 4) for clone 22C3 and 11.9% of cases (n = 5) for clone 28-8 (Table 2, Figure 2).